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Optimization method of star tracker orientation for sun-synchronous orbit based on space light distribution
Applied Optics
|October 20, 2017
Summary
This study presents a novel installation method for star trackers on sun-synchronous orbit spacecraft, mitigating stray light interference from the Sun and Earth albedo for enhanced precision.
Area of Science:
- Spacecraft Attitude Determination
- Optical Sensor Technology
- Astrodynamics
Background:
- Star trackers are crucial for high-precision spacecraft attitude determination.
- Susceptibility to stray light from the Sun and Earth albedo poses a significant challenge.
- Existing research lacks systematic analysis of stray light mitigation for star tracker installation.
Purpose of the Study:
- To propose and validate a systematic installation orientation method for star trackers on sun-synchronous orbit spacecraft.
- To analyze space light distribution relative to the spacecraft's body coordinate system.
- To optimize star tracker installation to prevent stray light interference.
Main Methods:
- Transformed complex Sun-Earth-satellite relative motion into the satellite's body coordinate system.
- Calculated boundary-curve equations for Sun and Earth albedo stray light exposure areas using coordinate transformation matrices.
- Optimized star tracker installation orientation based on derived boundary equations, avoiding iterative simulations.
Main Results:
- Developed an effective and precise method for determining optimal star tracker installation orientation.
- Successfully analyzed and mapped stray light distribution areas under various maneuver attitudes.
- Demonstrated the method's efficacy through simulation and verification experiments.
Conclusions:
- The proposed installation orientation method is effective and precise for sun-synchronous orbit star trackers.
- Provides a valuable reference for installing star trackers free from stray light interference.
- Enhances the reliability and accuracy of attitude determination in space missions.
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